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Overview:
Convert your mil-spec AR-15 lower into a lightweight, low-recoil 5.7x28mm carbine with the Panzer Arms AR57 16" ULT upper. The top-fed P90/PS90 magazine keeps optics clear and ejects brass downward through the magwell for cleaner, left-hand-friendly operation. Perfect for fast follow-up shots, range sessions, and PCC-style competition.

Key Features:
• Factory-matched BCG and 50-round P90 magazine included
• Top-mounted P90/PS90 mag — optics remain unobstructed
• Downward ejection through magwell eliminates side ejection issues
• True drop-in for standard AR-15 mil-spec lowers — minimal fitting required
• Free-float M-LOK handguard with full-length Pic rail for optics & accessories
• 16" barrel with 1/2x28 threads and muzzle brake installed
• Noticeably reduced felt recoil compared to typical 5.56 configurations

Included In The Box:
• Panzer Arms AR57 16" ULT complete upper (5.7x28)
• Matched bolt carrier group (BCG)
• Installed 1/2x28 muzzle brake
• Free-float M-LOK handguard
• One (1) 50-round P90/PS90-pattern magazine

Specs Snapshot:
Caliber: 5.7x28mm
Barrel: 16"
Threading: 1/2x28 (muzzle brake installed)
Action: Straight blowback with downward ejection
Magazine Type: P90/PS90-pattern (top-fed)
Included Capacity: 50 rounds
Fitment: Standard AR-15 mil-spec lower compatible
Rail: Full-length Picatinny top rail
Manufacturer: Panzer Arms
SKU / UPC: ULT0116 / 051497297985

Shipping & Pickup:
Ships from Fort Wayne, IN. Fast shipping to Florida addresses including Miami, Tampa, Orlando, Jacksonville, Tallahassee, Fort Lauderdale, West Palm Beach, Naples, and nearby regions. Ships nationwide where legal. Local pickup available in Fort Wayne by appointment. Shipping cost and delivery timeframe displayed in checkout.

Payments:
90-Day Layaway (25% down). Financing options up to 0% APR for qualified applicants. Email [email protected] for approval details and or support.

 

Watch It First:
We recorded a full YouTube review showing loading, mag changes, recoil, and accuracy testing. 

Watch the video before you buy to see how it runs.

 

FAQ:
Q — Does this need an FFL?
A — Typically no for uppers, but confirm your local/state rules. We comply with all required transfers.

Q — What comes with the upper?
A — Matched BCG, 50-rd P90-pattern magazine, and muzzle brake installed.

Q — Will it work on my AR-15 lower?
A — Yes — designed for mil-spec lowers as a drop-in solution.

Contact:
[email protected]

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